Look at this review/comparison of the 2 motherboards on The TechReport's website, which can be found here : http://techreport.com/articles.x/18539/1
I was basically having a otugh time deciding between the 2, but based on this comparison, the Asus will get the nod. It's generally quicker and in most cases uses less CPU power. I also like the eSATA on the backports. In addition, the price difference is not that significant between the 2 (Asus costs ~$15 CDN more). The Tech Report's comparison is the most informative on the web right now. other reviews of the motherboards are available, but are only on 1 or the other mobos.
Hope this helps.